Crispy Ranch Potatoes

4 large Potatoes -- un-peeled
1 tablespoon Vegetable Oil
1 package Ranch-style Dressing mix -- 0.4 ounces
1 cup Sour Cream, light -- for dipping

Preheat oven to 400 degrees F. Slice un-peeled potatoes into 1/4 inch thick slices, then place in a large bowl. Add oil to potatoes and mix lightly. Add dressing mix, tossing to coat evenly. Arrange potato slices in single layer on a greased baking sheet. (Do not overlap slices) Bake 30 - 40 minutes or until potatoes are browned and tender. Serve warm with sour cream to dip them in, as an appetizer.